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Q.

Which of the following mirrors is used by a dentist to examine a small cavity?


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a

Convex mirror

b

Plane mirror

c

Concave mirror

d

Combination of concave and convex mirror  

answer is C.

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Detailed Solution

A concave mirror is used by a dentist to examine a small cavity.
A concave mirror forms an erect and enlarged image when held close to the cavity. The reflecting surface of the concave mirror is bent towards the centre of the sphere of which the mirror is part. So dentists use concave mirrors to examine small cavities.
 
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